White papers

Covering categories including multicore, realtime, embedded Linux and much more, Enea's White Paper Directory is one of the best sources for technical white papers and information.

White Papers

  • Linux Real-Time Guide

    Enea’s Real Time Manual provides guidance when implementing a real-time application using Linux. The document explains areas of interest for real time system designers, including Linux scheduling models, interrupts and system calls.

  • How to scale with maintained performance and determinism

    The multicore technology introduces a great challenge to the entire software industry, and it causes a significant disruption to the embedded device market since it forces much of the existing software to be redesigned according to new, not yet established principles. Moore’s law does still hold, but processor vendors are rapidly turning to use the additional transistors to create more cores on the same die instead of increasing frequency since this not only gives more chip performance but also decreases the power consumption (watt/mips).

  • How Enea® Element can be configured to manage a fault-tolerant pair of Polyhedra database servers

    Both Polyhedra IMDB (In-Memory Database Management System) and Polyhedra Flash DBMS can be run in fault-tolerant mode with fail-over under the control of Enea's middleware product, Element. This white paper goes into the background of how this can be done, complete with code snippets.

  • Deploy virtual network functions efficiently on COTS hardware

    Telco and networking applications are often provided as vertically integrated solutions, where a vendor optimizes the overall solution for maximum performance and optimal power efficiency. In many cases, this requires specialized hardware and software. HP Moonshot System, with its commercial off-the-shelf (COTS) hardware, provides a standard server solution.

  • User-Space Device Drivers in Linux: A First Look

    Device drivers in Linux are traditionally run in kernel space, but can also be run in user space. This paper will take a look at running drivers in user space, trying to answer the questions in what degree the driver can run in user space and what can be gained from this?

  • Evaluating Linux IPC Performance

    As the number of cores increase in multicore SoC solutions, we see increased demands on effective communication inside multicore nodes and also on inter-node system-level. Also, the usage of Linux in embedded systems is increasing. New challenges arise in balancing cost and performance when selecting, integrating, and adapting mechanisms for multicore inter-process communication (IPC) in these systems.

  • High Speed User-Space Network I/O Solutions for Network Function Virtualization

    A first look at how Network Function Virtualization can achieve high speed north-south communication. This document presents performance benchmark results for a selection of recent solutions for high speed network I/O in user space host, and guest applications in a virtual machine. The paper compares the host and guest throughput performance, using state-of-the-art benchmarks and measurement methods.

  • Optimizing virtualization with KVM and NO_HZ

    NO_HZ makes it possible to minimize the frequency of the OS tick, thereby improving the real-time characteristics in Linux systems. By comparing virtualization (KVM) with and without NO_HZ, we observe that virtual environments benefit from uninterrupted execution.

  • Enabling Linux for Real-Time on Embedded Multicore Devices

    Linux has a strong momentum in the embedded software industry and has in the past years become the prevalent choice as an operating system for new platforms. However, standard Linux is designed for overall throughput rather than for real-time, and consequently needs to be modified or extended to meet high demands on latency and determinism. In parallel, advancements and trends within the semiconductor industry are driving an evolution towards manycore processors. By utilizing more flexible processor architectures, new possibilities emerge to enable real-time in Linux.

  • Simplify Distributed Systems with Frameworks from Enea Element

    Distributed systems range from simple multi-threaded applications to multi-slot chassis-based systems to networked clusters of servers. Topologies get more complex when these systems move into cloud-based environments, and more diverse when they involve machine-to-machine (or M2M) solutions.

  • The Architectural Advantages of OSE in Telecom

    The days are long gone when a real-time operating system (RT OS) was simply a small kernel providing basic services such as task scheduling and reliable inter-task communications. Today’s real-time operating systems are expected to perform a wide variety of functions ranging from managing real-time communications to providing a reliable foundation for higher level applications.

  • Polyhedra IMDB and High-Availability

    The Polyhedra IMDB and Polyhedra Flash DBMS database systems both come with an inbuilt mechanism for setting up a hot standby configuration, with control over fail-over. This article describes how this operates, and discusses how this can be used both to provide high availability and also a means to perform field upgrades with zero downtime.

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Covering categories including multicore, realtime, embedded Linux and much more, Enea's White Paper Directory is one of the best sources for technical white papers and information. Login/Register to download your free copies.

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